Information extraction using image data
First Claim
1. A method of determining a cloudiness value, comprising:
- identifying, based on color values, a first type of data elements among a plurality of data elements indicative of a sky portion of an image;
detecting, among the first type of data elements, a set of neighbouring data elements indicative of a sun portion of the image;
removing the set of neighbouring data elements indicative of the sun portion from the first type of data elements among the plurality of data elements indicative of the sky portion; and
determining a cloudiness value based at least in part on a proportion of a number of remaining first type of data elements after the removing to a number of the plurality of data elements indicative of the sky portion.
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Abstract
Techniques for weather information extraction using image data are described herein. In accordance with the present disclosure, economical weather data collection devices may be installed in any places on the earth, and form a dense network of weather data collection devices. Preferably, these weather data collection devices include image capture components that may capture series of sequential images over time (i.e., image streams) from any particular locations. The disclosed techniques include extracting a sky portion from a series of time-sequenced images. The extracted sky portion may be used for determining cloud coverage, a sun track, and so on, thereby enabling to provide accurate weather forecast as well as other weather data mining abilities.
45 Citations
20 Claims
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1. A method of determining a cloudiness value, comprising:
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identifying, based on color values, a first type of data elements among a plurality of data elements indicative of a sky portion of an image; detecting, among the first type of data elements, a set of neighbouring data elements indicative of a sun portion of the image; removing the set of neighbouring data elements indicative of the sun portion from the first type of data elements among the plurality of data elements indicative of the sky portion; and determining a cloudiness value based at least in part on a proportion of a number of remaining first type of data elements after the removing to a number of the plurality of data elements indicative of the sky portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system of determining a cloudiness value, comprising:
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at least a processor; and at least a memory communicatively coupled to the at least a processor to configure the at least a processor to; identify, based on color values, a first type of data elements among a plurality of data elements indicative of a sky portion of an image, detect, among the first type of data elements, a set of neighbouring data elements indicative of a sun portion of the image, remove the set of neighbouring data elements indicative of the sun portion from the first type of data elements among the plurality of data elements indicative of the sky portion, and determine a cloudiness value based at least in part on a proportion of a number of remaining first type of data elements after the removing to a number of the plurality of data elements indicative of the sky portion. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A non-transitory computer-readable storage medium bearing computer-readable instructions that upon execution on a computing device cause the computing device at least to:
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identify, based on color values, a first type of data elements among a plurality of data elements indicative of a sky portion of an image, detect, among the first type of data elements, a set of neighbouring data elements indicative of a sun portion of the image, remove the set of neighbouring data elements indicative of the sun portion from the first type of data elements among the plurality of data elements indicative of the sky portion, and determine a cloudiness value based at least in part on a proportion of a number of remaining first type of data elements after the removing to a number of the plurality of data elements indicative of the sky portion. - View Dependent Claims (18, 19, 20)
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Specification